US8837115B2 - Electrolytic capacitor - Google Patents

Electrolytic capacitor Download PDF

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Publication number
US8837115B2
US8837115B2 US13/498,359 US201013498359A US8837115B2 US 8837115 B2 US8837115 B2 US 8837115B2 US 201013498359 A US201013498359 A US 201013498359A US 8837115 B2 US8837115 B2 US 8837115B2
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Prior art keywords
anode
conductive member
electrolytic capacitor
capacitor element
pair
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Expired - Fee Related, expires
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US13/498,359
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US20120243146A1 (en
Inventor
Hideki Ishida
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Assigned to SANYO ELECTRIC CO,. LTD. reassignment SANYO ELECTRIC CO,. LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ISHIDA, HIDEKI
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/008—Terminals
    • H01G9/012—Terminals specially adapted for solid capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/15—Solid electrolytic capacitors
    • H01G9/151—Solid electrolytic capacitors with wound foil electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004—Details
    • H01G9/04—Electrodes or formation of dielectric layers thereon
    • H01G9/048—Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/055—Etched foil electrodes

Definitions

  • the present invention relates to an electrolytic capacitor capable of removing high-frequency noise.
  • the electrolytic capacitor of a two terminal structure When the electrolytic capacitor of a two terminal structure is mounted on a circuit board, the electrolytic capacitor is connected between a power supply line connecting a load circuit such as a CPU (central processing unit) and a power supply circuit supplying DC current to the load circuit, and the ground. Mounting the electrolytic capacitor on the circuit board in this way causes the electrolytic capacitor to function as a secondary battery to supply electrical charges to the load circuit if load fluctuations are generated in the load circuit, while causing the electrolytic capacitor to function as a noise filter to remove high-frequency noise from the power supply line if the high-frequency noise is generated in response to drive of the load circuit.
  • a load circuit such as a CPU (central processing unit)
  • a power supply circuit supplying DC current to the load circuit
  • the ground Mounting the electrolytic capacitor on the circuit board in this way causes the electrolytic capacitor to function as a secondary battery to supply electrical charges to the load circuit if load fluctuations are generated in the load circuit, while causing the electrolytic capacitor to function as a noise
  • patent literature 1 suggests an electrolytic capacitor formed by placing an anode foil and a cathode foil one above the other to which a pair of anode terminals and a cathode terminal are electrically connected respectively, and by winding the anode and cathode foils.
  • a dielectric layer is formed on a surface of the anode foil, and a separator saturated with an electrolytic solution is placed between the dielectric layer and the cathode foil.
  • the electrolytic capacitor of a three terminal structure disclosed in patent literature 1 makes an equivalent series resistance (ESR) generated between the anode terminals as a pair higher than the resistance of a power supply line.
  • ESR equivalent series resistance
  • conducting part having a high electrical resistance generates heat, generating a fear of breakdown of the electrolytic capacitor, and also, a fear of breakdown of a member located around the electrolytic capacitor.
  • an object of the present invention to provide an electrolytic capacitor capable of causing DC current of a large current amount to flow between anode terminals as a pair, and capable of guiding high-frequency noise from an anode to a cathode.
  • a first electrolytic capacitor of the present invention includes an electrolytic capacitor element, anode terminals as a pair, and a conductive member.
  • the capacitor element has an element body formed by placing an anode foil and a cathode foil one above the other and by winding the anode and cathode foils, anode leads as a pair electrically connected to the anode foil, and a cathode lead electrically connected to the cathode foil.
  • a dielectric layer is formed on a surface of the anode foil.
  • An electrolyte layer is placed between the dielectric layer and the cathode foil.
  • the anode terminals as a pair are each electrically connected to corresponding one of the anode leads as a pair of the capacitor element.
  • the conductive member electrically connects the anode terminals to each other outside the capacitor element.
  • the aforementioned electrolytic capacitor is capable of making the resistance of the conductive member lower than an equivalent series resistance (ESR) generated between the anode leads as a pair of the capacitor element.
  • ESR equivalent series resistance
  • a second electrolytic capacitor of the present invention includes an electrolytic capacitor element, anode terminals as a pair, and a conductive member.
  • the capacitor element has an element body formed by placing two anode foils electrically isolated from each other and a cathode foil one above the other and by winding the anode and cathode foils, anode leads as a pair each electrically connected to corresponding one of the two anode foils, and a cathode lead electrically connected to the cathode foil.
  • a dielectric layer is formed on surfaces of the anode foils.
  • An electrolyte layer is placed between the dielectric layer and the cathode foil.
  • the anode terminals as a pair are each electrically connected to corresponding one of the anode leads as a pair of the capacitor element.
  • the conductive member electrically connects the anode terminals to each other outside the capacitor element.
  • the conductive member electrically connects the anode terminals as a pair outside the capacitor element, and at the same time, the anode terminals as a pair are electrically isolated from each other inside the capacitor element. So, DC current flowing between the anode terminals as a pair flows through the conductive member having a low resistance, allowing increase of the current amount of the DC current.
  • the conductive member is composed of a bottomed cylindrical metal case housing the capacitor element.
  • the conductive member is a bottomed cylindrical insulating case with a conductive layer at the inner circumference thereof, and the conductive layer electrically connects the anode terminals to each other.
  • the conductive member has an inductance higher than the equivalent series inductance of the capacitor element.
  • High-frequency noise flows easily into part having a low inductance. So, in these specific structures, high-frequency noise entering the anode terminals is led toward the capacitor element, and is then guided efficiently to the cathode lead of the capacitor element.
  • the conductive member is given a constriction that makes the width of the conductive member small in a direction that crosses an electrical path extending from one of the anode terminals to the other of the anode terminals along a surface of the conductive member.
  • the inductance of the conductive member can be made higher than the equivalent series inductance (ESL) of the capacitor element.
  • the electrolytic capacitor of the present invention is capable of causing DC current of a large current amount to flow between the anode terminals as a pair, and capable of guiding high-frequency noise from an anode to a cathode.
  • FIG. 1 is a perspective view showing an electrolytic capacitor of an embodiment of the present invention.
  • FIG. 2 is a plan view of the electrolytic capacitor as viewed from a bottom wall of a metal case provided in the electrolytic capacitor.
  • FIG. 3 is a sectional view taken along line A-A shown in FIG. 2 .
  • FIG. 4 is a perspective view showing an element body of a capacitor element provided in the electrolytic capacitor.
  • FIG. 5 is a perspective view explaining a process of manufacturing the capacitor element.
  • FIG. 6 is a perspective view explaining a different aspect of the manufacture of the capacitor element.
  • FIG. 7 is a perspective view showing a modification of the capacitor element of the electrolytic capacitor.
  • FIG. 8 is a perspective view explaining a process of manufacturing the capacitor element of the modification.
  • FIG. 9 is a perspective view explaining a different aspect of the manufacture of the capacitor element of the modification.
  • FIG. 1 is a perspective view showing an electrolytic capacitor of an embodiment of the present invention.
  • the electrolytic capacitor of the present embodiment includes an electrolytic capacitor element ( 1 ), and a bottomed cylindrical metal case ( 6 ) housing the capacitor element ( 1 ).
  • FIG. 2 is a plan view of the electrolytic capacitor as viewed from a bottom wall ( 603 ) of the metal case ( 6 ).
  • FIG. 3 is a sectional view taken along line A-A shown in FIG. 2 .
  • the capacitor element ( 1 ) includes an element body ( 2 ), a pair of anode leads ( 31 ) and ( 32 ), and a cathode lead ( 4 ).
  • FIG. 4 is a perspective view showing the element body ( 2 ).
  • the element body ( 2 ) is a wound body formed by placing a long-length anode foil ( 21 ) and a long-length cathode foil ( 22 ) one above the other, and by winding the anode and cathode foils ( 21 ) and ( 22 ).
  • Two separators ( 51 ) and ( 52 ) made of craft paper or the like are placed between the anode and cathode foils ( 21 ) and ( 22 ).
  • the anode and cathode foils ( 21 ) and ( 22 ) are made of a valve acting metal such as aluminum.
  • a surface of the anode foil ( 21 ) is given fine recesses and projections formed as a result of etching process. So, the anode foil ( 21 ) has a wide surface area.
  • the surface of the anode foil ( 21 ) is also provided with an oxide coating film formed as a result of chemical conversion process. This means that a dielectric layer made of the oxide coating film is formed on the surface of the anode foil ( 21 ).
  • a dielectric layer made of an oxide coating film may also be formed on a surface of the cathode foil ( 22 ).
  • a solid electrolyte layer is formed between the dielectric layer on the surface of the anode foil ( 21 ) and the cathode foil ( 22 ).
  • the solid electrolyte layer may be formed of materials such as an inorganic semiconductor, an organic semiconductor, and a conductive polymer.
  • the pair of anode leads ( 31 ) and ( 32 ) is electrically connected to the anode foil ( 21 ), and the cathode lead ( 4 ) is electrically connected to the cathode foil ( 22 ).
  • the cathode lead ( 4 ) is pulled out through a central portion of an edge surface ( 2 a ).
  • the edge surface ( 2 a ) is part of a surface of the element body ( 2 ) and crosses the winding axis of the element body ( 2 ).
  • the anode leads ( 31 ) and ( 32 ) as a pair are pulled out through an outer circumferential section of the edge surface ( 2 a ) at positions opposite each other with respect to the cathode lead ( 4 ).
  • the long-length anode foil ( 21 ) and the long-length cathode foil ( 22 ) are placed one above the other while the first separator ( 51 ) is placed between the anode and cathode foils ( 21 ) and ( 22 ). Further, the second separator ( 52 ) is placed to cover a surface of the cathode foil ( 22 ) opposite the surface thereof over which the anode foil ( 21 ) is placed, thereby forming a long-length body ( 20 ).
  • the pair of anode leads ( 31 ) and ( 32 ) and the cathode lead ( 4 ) are electrically connected to the anode and cathode foils ( 21 ) and ( 22 ) respectively such that the pair of anode leads ( 31 ) and ( 32 ) and the cathode lead ( 4 ) are placed at their predetermined positions on the edge surface ( 2 a ) of the element body ( 2 ) when the element body ( 2 ) is formed by winding the long-length body ( 20 ).
  • the long-length body ( 20 ) is wound from the right end thereof shown in FIG. 5 while the anode foil ( 21 ) is placed at the innermost side.
  • formation of the element body ( 2 ) is completed from which the pair of anode leads ( 31 ) and ( 32 ), and the cathode lead ( 4 ) are pulled out as shown in FIG. 4 .
  • the cathode lead ( 4 ) may be connected to the cathode foil ( 22 ) at a substantially middle position in the longitudinal direction thereof, and the anode leads ( 31 ) and ( 32 ) as a pair may be connected to the anode foil ( 21 ) at opposite end portions thereof as shown in FIG. 6 .
  • the long-length body ( 20 ) is wound from a substantially middle position in the longitudinal direction thereof.
  • the solid electrolyte layer is thereafter formed by using a conductive polymer. More specifically, the element body ( 2 ) is dipped into a polymerization solution containing a precursor solution of the conductive polymer, and then chemical polymerization or electropolymerization is generated. Dipping the element body ( 2 ) in the polymerization solution makes the polymerization solution penetrate the two separators ( 51 ) and ( 52 ) to seep into between the dielectric layer formed on the surface of the anode foil ( 21 ) and the cathode foil ( 22 ). As a result, the solid electrolyte layer is formed between the dielectric layer on the surface of the anode foil ( 21 ) and the cathode foil ( 22 ), thereby completing the formation of the capacitor element ( 1 ).
  • the metal case ( 6 ) is made of a conductive member such as aluminum. As shown in FIG. 1 , the metal case ( 6 ) is given a pair of flange portions ( 61 ) and ( 62 ). The flange portions ( 61 ) and ( 62 ) as a pair are formed by extending parts of the metal case ( 6 ) outward from two regions defined in an opening edge ( 601 ) of the metal case ( 6 ). In the embodiment, the flange portions ( 61 ) and ( 62 ) as a pair are provided at opposite sides of a cylindrical part ( 60 ) of the metal case ( 6 ) as shown in FIG. 2 . However, this is not the only positions of the flange portions ( 61 ) and ( 62 ) as a pair.
  • an outer wall ( 602 ) of the cylindrical part ( 60 ) of the metal case ( 6 ) is given a pair of constrictions ( 63 ) (only one of the constrictions ( 63 ) is shown in FIG. 1 ).
  • the constrictions ( 63 ) as a pair are exposed at the opening edge ( 601 ) in two regions located between the regions where the flange portions ( 61 ) and ( 62 ) as a pair are formed. So, the width of the outer wall ( 602 ) is smaller between the flange portions ( 61 ) and ( 62 ) as a pair.
  • the capacitor element ( 1 ) is housed in the metal case ( 6 ) in a position that makes the edge surface ( 2 a ) of the element body ( 2 ) face a side of the metal case ( 6 ) opposite the bottom wall ( 603 ).
  • the anode leads ( 31 ) and ( 32 ) as a pair of the capacitor element ( 1 ) are electrically connected respectively to the flange portions ( 61 ) and ( 62 ) as a pair of the metal case ( 6 ).
  • the pair of flange portions ( 61 ) and ( 62 ) forms a pair of anode terminals of the electrolytic capacitor
  • the cylindrical part ( 60 ) of the metal case ( 6 ) forms a conductive member electrically connecting the anode terminals to each other outside the capacitor element ( 1 ).
  • the presence of the pair of constrictions ( 63 ) makes the width of the cylindrical part ( 60 ) of the metal case ( 6 ) small in a direction that crosses an electrical path extending from one flange portion ( 61 ) to the other flange portion ( 62 ) along a surface of the cylindrical part ( 60 ).
  • the cylindrical part ( 60 ) of the metal case ( 6 ) has an inductance higher than the equivalent series inductance (ESL) of the capacitor element ( 1 ).
  • an opening of the metal case ( 6 ) is sealed with a sealing material ( 7 ) made of a resin material, a rubber material, or the like.
  • the cathode lead ( 4 ) of the capacitor element ( 1 ) is supported by the sealing material ( 7 ) by making the tip end portion of the cathode lead ( 4 ) project outward of a surface of the sealing material ( 7 ), thereby fixedly placing the capacitor element ( 1 ) in the metal case ( 6 ).
  • the tip end portion of the cathode lead ( 4 ) forms a cathode terminal of the electrolytic capacitor.
  • the sealing material ( 7 ) is inserted into the opening of the metal case ( 6 ), and thereafter, an opening edge portion of the metal case ( 6 ) is swaged to fix the sealing material ( 7 ) to the metal case ( 6 ), thereby sealing the opening of the metal case ( 6 ).
  • the aforementioned electrolytic capacitor is capable of making the resistance of the cylindrical part ( 60 ) of the metal case ( 6 ) lower than an equivalent series resistance (ESR) generated between the anode leads ( 31 ) and ( 32 ) as a pair of the capacitor element ( 1 ).
  • ESR equivalent series resistance
  • DC current flowing between the flange portions ( 61 ) and ( 62 ) as a pair (anode terminals as a pair) flows easily through the cylindrical part ( 60 ) of the metal case ( 6 ) having a low resistance, allowing increase of the current amount of the DC current.
  • High-frequency noise flows easily into part having a low inductance.
  • the inductance of the cylindrical part ( 60 ) of the metal case ( 6 ) is higher than the equivalent series inductance (ESL) of the capacitor element ( 1 ). So, high-frequency noise entering the flange portions ( 61 ) and ( 62 ) (anode terminals) is led toward the capacitor element ( 1 ), and is then guided efficiently to the cathode lead ( 4 ) of the capacitor element ( 1 ).
  • the flange portions ( 61 ) and ( 62 ) as a pair (anode terminals as a pair) of electrolytic capacitor are connected to a load circuit and a power supply circuit respectively, and the tip end portion (cathode terminal) of the cathode lead ( 4 ) of the electrolytic capacitor is connected to the ground.
  • DC current from the power supply circuit passes through the metal case ( 6 ) having a low resistance, and is then supplied to the load circuit. This makes it possible to supply DC current of a large current amount from the power supply circuit to the load circuit. High-frequency noise generated in the load circuit is led toward the capacitor element ( 1 ) of the electrolytic capacitor, and is then guided efficiently to the ground.
  • FIG. 7 is a perspective view showing a modification of the capacitor element of the aforementioned electrolytic capacitor.
  • the element body ( 2 ) of the capacitor element ( 1 ) may be a wound body formed by placing two long-length anode foils ( 23 ) and ( 24 ) one above the other with a cathode foil ( 25 ) being placed therebetween, and by winding the anode foils ( 23 ) and ( 24 ) and the cathode foil ( 25 ).
  • three separators ( 53 ), ( 54 ) and ( 55 ) made of craft paper or the like are placed between the two anode foils ( 23 ) and ( 24 ) and the cathode foil ( 25 ).
  • the two anode foils ( 23 ) and ( 24 ) and the cathode foil ( 25 ) are made of a valve acting metal such as aluminum. Surfaces of the two anode foils ( 23 ) and ( 24 ) are given fine recesses and projections formed as a result of etching process. So, the two anode foils ( 23 ) and ( 24 ) both have wide surface areas.
  • the surfaces of the two anode foils ( 23 ) and ( 24 ) are also provided with an oxide coating film formed as a result of chemical conversion process. This means that a dielectric layer made of the oxide coating film is formed on the surfaces of the two anode foils ( 23 ) and ( 24 ). A dielectric layer made of an oxide coating film may also be formed on a surface of the cathode foil ( 25 ).
  • a solid electrolyte layer is formed between the dielectric layer on the surfaces of the two anode foils ( 23 ) and ( 24 ) and the cathode foil ( 25 ).
  • the solid electrolyte layer may be formed of materials such as an inorganic semiconductor, an organic semiconductor, and a conductive polymer.
  • the anode leads ( 31 ) and ( 32 ) as a pair are electrically connected to the two anode foils ( 23 ) and ( 24 ) respectively, and the cathode lead ( 4 ) is electrically connected to the cathode foil ( 25 ).
  • the long-length cathode foil ( 25 ) is placed between the two long-length anode foils ( 23 ) and ( 24 ). Further, the first and second separators ( 53 ) and ( 54 ) are placed between the anode foil ( 23 ) and the cathode foil ( 25 ) and between the anode foil ( 24 ) and the cathode foil ( 25 ) respectively. Still further, the third separator ( 55 ) is placed to cover a surface of the anode foil ( 24 ) opposite the surface thereof over which the cathode foil ( 25 ) is placed, thereby forming a long-length body ( 201 ).
  • the anode leads ( 31 ) and ( 32 ) as a pair and the cathode lead ( 4 ) are electrically connected respectively to the two anode foils ( 23 ) and ( 24 ) and the cathode foil ( 25 ) such that the pair of anode leads ( 31 ) and ( 32 ) and the cathode lead ( 4 ) are placed at their predetermined positions on the edge surface ( 2 a ) of the element body ( 2 ) when the element body ( 2 ) is formed by winding the long-length body ( 201 ).
  • the long-length body ( 201 ) is wound from the right end thereof shown in FIG. 8 while the anode foil ( 23 ) is placed at the innermost side.
  • formation of the element body ( 2 ) of the capacitor element ( 1 ) of the modification is completed as shown in FIG. 7 .
  • the solid electrolyte layer is thereafter formed by using a conductive polymer. More specifically, the element body ( 2 ) is dipped into a polymerization solution containing a precursor solution of the conductive polymer, and then chemical polymerization or electropolymerization is generated. Dipping the element body ( 2 ) in the polymerization solution makes the polymerization solution penetrate the three separators ( 53 ), ( 54 ) and ( 55 ) to seep into between the dielectric layer formed on the surfaces of the two anode foils ( 23 ) and ( 24 ) and the cathode foil ( 25 ).
  • the solid electrolyte layer is formed between the dielectric layer on the surfaces of the two anode foils ( 23 ) and ( 24 ) and the cathode foil ( 25 ), thereby completing the formation of the capacitor element ( 1 ) of the modification.
  • the cylindrical part ( 60 ) of the metal case ( 6 ) electrically connects the flange portions ( 61 ) and ( 62 ) as a pair (anode terminals as a pair) of the metal case ( 6 ) outside the capacitor element ( 1 ), and at the same time, the flange portions ( 61 ) and ( 62 ) as a pair (anode terminals as a pair) are electrically isolated from each other inside the capacitor element ( 1 ).
  • the capacitor element ( 1 ) may be formed by using a long-length body ( 202 ) shown in FIG. 9 . More specifically, the long-length body ( 202 ) is formed by placing the long-length cathode foil ( 25 ) between the first and second separators ( 53 ) and ( 54 ), and by placing the two anode foils ( 23 ) and ( 24 ) to cover different regions of a surface of the first separator ( 53 ) opposite the surface thereof on which the cathode foil ( 25 ) is placed. The two anode foils ( 23 ) and ( 24 ) are arranged at positions separated from each other to provide electrical isolation therebetween.
  • the cathode lead ( 4 ) is connected to the cathode foil ( 25 ) at a substantially middle position in the longitudinal direction thereof, and the anode leads ( 31 ) and ( 32 ) as a pair are connected to the two anode foils ( 23 ) and ( 24 ) respectively. Further, the long-length body ( 202 ) is wound from a substantially middle position in the longitudinal direction thereof.
  • the cylindrical part ( 60 ) of the metal case ( 6 ) is given the pair of constrictions ( 63 ) in order to make the inductance of the cylindrical part ( 60 ) of the metal case ( 6 ) higher than the equivalent series inductance (ESL) of the capacitor element ( 1 ), to which the present invention is not intended to be limited.
  • the inductance of the cylindrical part ( 60 ) of the metal case ( 6 ) can be made higher than the equivalent series inductance (ESL) of the capacitor element ( 1 ) by forming one or a plurality of through holes in the cylindrical part ( 60 ) of the metal case ( 6 ).
  • the metal case ( 6 ) may be replaced a bottomed cylindrical insulating case with a conductive layer at the inner circumference thereof that houses the capacitor element ( 1 ).
  • part of the conductive layer can form a pair of anode terminals of the electrolytic capacitor.
  • a pair of anode terminals may be provided in addition to the conductive layer, and the conductive layer may electrically connect the anode terminals to each other.
  • Each structure employed in the aforementioned electrolytic capacitor is not applied only to an electrolytic capacitor of a three terminal structure, but it is also applicable to an electrolytic capacitor having four or more terminals.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
US13/498,359 2009-09-30 2010-09-27 Electrolytic capacitor Expired - Fee Related US8837115B2 (en)

Applications Claiming Priority (3)

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JP2009-226912 2009-09-30
JP2009226912 2009-09-30
PCT/JP2010/066653 WO2011040353A1 (ja) 2009-09-30 2010-09-27 電解コンデンサ

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US8837115B2 true US8837115B2 (en) 2014-09-16

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JP (1) JP5516593B2 (zh)
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WO (1) WO2011040353A1 (zh)

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US20140262459A1 (en) * 2013-03-18 2014-09-18 Apaq Technology Co., Ltd. Winding-type solid electrolytic capacitor package structure using a carrier board and method of manufacturing the same
US10957492B2 (en) 2016-03-29 2021-03-23 Tdk Electronics Ag Electrolytic capacitor
US20220108837A1 (en) * 2019-08-08 2022-04-07 Murata Manufacturing Co., Ltd. Film capacitor and exterior case for film capacitor
US11631546B2 (en) 2018-03-27 2023-04-18 Tdk Electronics Ag Capacitor and method for producing a capacitor
US11646164B2 (en) 2018-03-27 2023-05-09 Tdk Electronics Ag Capacitor and method for producing a capacitor

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TWI485730B (zh) * 2012-12-28 2015-05-21 Apaq Technology Co Ltd 不需使用導線架的捲繞型固態電解電容器封裝結構及其製作方法
CN110400697B (zh) * 2015-04-28 2023-03-03 松下知识产权经营株式会社 电解电容器
CN113593913A (zh) * 2021-08-26 2021-11-02 厦门阳光恩耐照明有限公司 一种铝电解电容器及其制备方法

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CN102576612A (zh) 2012-07-11
US20120243146A1 (en) 2012-09-27

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